Terraform set variable with default value if empty

Question

Hello i have problem with:

   on ../terraform-modules/terraform-employee/main.tf line 146, in module "ac-vm":
│  146:     token_user            = module.ac-gitlab[0].token
│     ├────────────────
│     │ module.ac-gitlab is empty tuple
│ 
│ The given key does not identify an element in this collection value: the collection has no elements.

  gitlab = {
   token_user            = module.ac-gitlab[0].token

  }

The problem is when it's empty. It is empty because it was not created for him on purpose.

it tries to do if null then some other default value.

Answer 1

I solved.

token_user = length(module.ac-gitlab) > 0 ? module.ac-gitlab[0].token : ""